diff options
Diffstat (limited to 'cpukit/libnetworking/netinet/in_cksum_nios2.h')
| -rw-r--r-- | cpukit/libnetworking/netinet/in_cksum_nios2.h | 248 |
1 files changed, 0 insertions, 248 deletions
diff --git a/cpukit/libnetworking/netinet/in_cksum_nios2.h b/cpukit/libnetworking/netinet/in_cksum_nios2.h deleted file mode 100644 index 1b34a28707..0000000000 --- a/cpukit/libnetworking/netinet/in_cksum_nios2.h +++ /dev/null @@ -1,248 +0,0 @@ - -/* - * Altera Nios2 CRC checksum computation - * - * Author: Jeffrey O. Hill - * - * Copyright 2012. Los Alamos National Security, LLC. - * This material was produced under U.S. Government contract - * DE-AC52-06NA25396 for Los Alamos National Laboratory (LANL), - * which is operated by Los Alamos National Security, LLC for - * the U.S. Department of Energy. The U.S. Government has rights - * to use, reproduce, and distribute this software. NEITHER THE - * GOVERNMENT NOR LOS ALAMOS NATIONAL SECURITY, LLC MAKES ANY - * WARRANTY, EXPRESS OR IMPLIED, OR ASSUMES ANY LIABILITY FOR - * THE USE OF THIS SOFTWARE. - * - * COPYRIGHT (c) 1989-2012. - * On-Line Applications Research Corporation (OAR). - * - * Copyright (c) 1997 Mark Brinicome - * Copyright (c) 1997 Causality Limited - * - * Copyright (c) 1995 Zubin Dittia. - * Copyright (c) 1995 Matthew R. Green. - * Copyright (c) 1994 Charles M. Hannum. - * Copyright (c) 1992, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * Based on the arm / sparc version, but using instead - * mostly inline functions in place of naaasty macros. - * - * It would be a great idea to somehow detect at runtime - * that the Nios2 has a user defined instruction that - * computes the CRC and invoke it here (we could call a - * function in the BSP). - */ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/mbuf.h> -#include <netinet/in.h> -#include <netinet/in_systm.h> -#include <netinet/ip.h> -#include <netinet/ip_var.h> -#include <machine/in_cksum.h> - -/* - * Checksum routine for Internet Protocol family headers. - * - * This routine is very heavily used in the network - * code and should be modified for each CPU to be as fast as possible. - */ -static inline uint32_t _NIOS2_Add_ones_complement_64 -( uint32_t sum, const uint32_t * const pWd ) -{ - sum = _NIOS2_Add_ones_complement ( sum, pWd[0] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[1] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[2] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[3] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[4] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[5] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[6] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[7] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[8] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[9] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[10] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[11] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[12] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[13] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[14] ); - return _NIOS2_Add_ones_complement ( sum, pWd[15] ); -} - -static inline uint32_t _NIOS2_Add_ones_complement_32 -( uint32_t sum, const uint32_t * const pWd ) -{ - sum = _NIOS2_Add_ones_complement ( sum, pWd[0] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[1] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[2] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[3] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[4] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[5] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[6] ); - return _NIOS2_Add_ones_complement ( sum, pWd[7] ); -} - -static inline uint32_t _NIOS2_Add_ones_complement_16 -( uint32_t sum, const uint32_t * const pWd ) -{ - sum = _NIOS2_Add_ones_complement ( sum, pWd[0] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[1] ); - sum = _NIOS2_Add_ones_complement ( sum, pWd[2] ); - return _NIOS2_Add_ones_complement ( sum, pWd[3] ); -} - -static inline uint32_t _NIOS2_Add_ones_complement_8 -( uint32_t sum, const uint32_t * const pWd ) -{ - sum = _NIOS2_Add_ones_complement ( sum, pWd[0] ); - return _NIOS2_Add_ones_complement ( sum, pWd[1] ); -} - -static inline uint32_t _NIOS2_Add_ones_complement_4 -( uint32_t sum, const uint32_t * const pWd ) -{ - return _NIOS2_Add_ones_complement ( sum, pWd[0] ); -} - -static inline uint32_t _NIOS2_Reduce_checksum ( uint32_t a ) -{ - uint32_t tmp; - __asm__ __volatile__ ( - " srli %1, %0, 16 \n" /* tmp = a >> 16 */ - " andi %0, %0, 0xffff \n" /* a = a & 0xffff */ - " add %0, %0, %1 \n" /* a = a + tmp */ - : "+&r"(a), "=&r"(tmp) - ); - return a; -} - -#define combineTokens( A, B ) A ## B - -#define ADD_AND_ADVANCE( N ) \ -if ( mlen >= N ) { \ - sum = combineTokens ( _NIOS2_Add_ones_complement_, N ) \ - ( sum, ( uint32_t * ) w ); \ - mlen -= N; \ - w += N; \ -} - -static int -in_cksum_internal(struct mbuf *m, int off, int len, u_int sum) -{ - const uint8_t * w; - int mlen = 0; - int byte_swapped = 0; - - for (; m && len; m = m->m_next) - { - if (m->m_len == 0) - continue; - w = mtod(m, u_char *) + off; - mlen = m->m_len - off; - off = 0; - if (len < mlen) - mlen = len; - len -= mlen; - - /* - * Ensure that we're aligned on a word boundary here so - * that we can do 32 bit operations below. - */ - if ((3 & (uint32_t)w) != 0) - { - sum = _NIOS2_Reduce_checksum ( sum ); - if ((1 & (uint32_t)w) != 0 && mlen >= 1) - { - sum <<= 8u; - sum += *w << 8u; - byte_swapped ^= 1; - w += 1; - mlen -= 1; - } - if ((2 & (uint32_t)w) != 0 && mlen >= 2) - { - sum += *(uint16_t *)w; - w += 2; - mlen -= 2; - } - } - - /* - * instead of using a loop, process in unrolled chunks - */ - while ( mlen >= 64 ) - { - sum = _NIOS2_Add_ones_complement_64 - ( sum, ( uint32_t * ) w ); - mlen -= 64; - w += 64; - } - ADD_AND_ADVANCE ( 32 ); - ADD_AND_ADVANCE ( 16 ); - ADD_AND_ADVANCE ( 8 ); - ADD_AND_ADVANCE ( 4 ); - - if ( mlen > 0 ) - { - sum = _NIOS2_Reduce_checksum ( sum ); - if ( mlen >= 2 ) - { - sum += *(uint16_t *)w; - w += 2; - mlen -= 2; - } - if ( mlen == 1 ) - { - sum <<= 8u; - sum += *w << 8u; - byte_swapped ^= 1; - } - } - } - if ( byte_swapped ) - { - sum = _NIOS2_Reduce_checksum ( sum ); - sum <<= 8u; - } - sum = _NIOS2_Add_ones_complement_word_halves ( sum ); - sum ^= 0xffff; - return sum; -} - -int -in_cksum ( - struct mbuf *m, - int len ) -{ - return in_cksum_internal ( m, 0, len, 0 ); -} |